Sonnet's Qio E3 provides users with the ability to transfer data concurrently from three SxS cards for Sony HD DV camcorders, thereby dramatically increasing efficiency. Users can copy files between any cards and the computer with aggregate bandwidth of up to 200 MB/sec. The unit's slots also accept ExpressCard/34 adapters, enabling the use of WiFi, FireWire, USB, Gigabit Ethernet, and others, regardless of the interfaces present on the computer. Users can even transfer files from SxS media while using ExpressCard/34 adapters. Designed for both in-studio or on-location use, the E3 features a rugged, compact case with the same 15-cm (5.9-inches) by 16-cm (6.2-inches) footprint as the original Qio, but with half the profile.

Qio E3 connects to a computer through an included ExpressCard/34 (for notebooks) or a PCIe interface adapter card (for desktops). The included adapter extends the computer's 2.5 Gbps PCIe bus outside the computer to the Qio E3 enclosure, effectively adding expansion slots outside the computer and enabling users to easily swap out adapter cards without having to open up the computer's case.